package com.airshiplay.netconf;


import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.ChannelHandler.Sharable;
/**
 * Sharable表示此对象在channel间共享
 * handler类是我们的具体业务类
 * @author airlenet
 * @version 2017-09-19
 */

@Sharable//注解@Sharable可以让它在channels间共享
public class EchoServerHandler extends ChannelInboundHandlerAdapter{
    public void channelRead(ChannelHandlerContext ctx, Object msg) {
        System.out.println("server received data :" + msg);
        ctx.write(msg);//写回数据，
    }
    public void channelReadComplete(ChannelHandlerContext ctx) {
        ctx.writeAndFlush(Unpooled.EMPTY_BUFFER) //flush掉所有写回的数据
                .addListener(ChannelFutureListener.CLOSE); //当flush完成后关闭channel
    }
    public void exceptionCaught(ChannelHandlerContext ctx,Throwable cause) {
        cause.printStackTrace();//捕捉异常信息
        ctx.close();//出现异常时关闭channel
    }
}